Multiple muon events observed underground |
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Authors: | M R Krishnaswamy M G K Menon V S Narasimham K Hinotani S Kawakami S Miyake |
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Institution: | 1. Tata Institute of Fundamental Research, Bombay, India 2. Osaka City University, Osaka, Japan
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Abstract: | Observations are reported on events involving multiple penetrating particles recorded in a scintillator-neon flash tube telescope, at a depth of 1500 hg/cm2 in the Kolar Gold Mines. From these, it is shown that: (1) the cross-section for nuclear interaction of muons of average energy ~200 GeV is ~ 6 × 10?30 cm2/nucleon; (2) the decoherence curve for events involving two parallel muons is uniform over the range of distances from 0 to 2 metres; and (3) the angular distribution of double-parallel muons closely resembles that of single muons, implying that these two types of events are probably produced in the atmosphere in a similar manner. |
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